Delayed Blast Fireball

This spell creates a fireball, with a +1 bonus to each of its dice of damage, which releases its blast anywhere from instantly to five rounds later, according to the command given by the wizard. In other respects, the spell is the same as the 3rd-level spell Fireball.

[Player's Handbook]

School: Evocation
Level: 7
Rarity: Common

Range: 100 yards + 10 yards/level
Components: V, S, M
Duration: Special
Casting Time: 7
Area of Effect: 20-foot-radius globe
Saving Throw: 1/2

Material Components: a tiny ball of bat guano and sulfur (consumed)